misc.c revision 1.23
1 /* $NetBSD: misc.c,v 1.23 2020/05/02 18:42:30 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2008 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Christos Zoulas 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __RCSID("$NetBSD: misc.c,v 1.23 2020/05/02 18:42:30 christos Exp $"); 34 35 #include <stdbool.h> 36 #include <sys/param.h> 37 #include <sys/types.h> 38 #include <sys/time.h> 39 #include <sys/stat.h> 40 #include <sys/condvar.h> 41 #include <sys/selinfo.h> 42 #include <sys/filedesc.h> 43 #define _KERNEL 44 #include <sys/mqueue.h> 45 #include <sys/eventvar.h> 46 #undef _KERNEL 47 #include <sys/proc.h> 48 #define _KERNEL 49 #include <sys/file.h> 50 #define copyin_t int 51 #define copyout_t int 52 #include <sys/ksem.h> 53 #define _LIB_LIBKERN_LIBKERN_H_ 54 #define mutex_enter(a) 55 #define mutex_exit(a) 56 #undef _KERNEL 57 #include <sys/cprng.h> 58 #include <sys/vnode.h> 59 #include <sys/mount.h> 60 61 #include <net/bpfdesc.h> 62 63 #include <err.h> 64 #include <util.h> 65 #include <string.h> 66 #include <kvm.h> 67 #include "fstat.h" 68 69 static struct nlist nl[] = { 70 #define NL_BPF 0 71 { .n_name = "bpf_fileops", }, 72 #define NL_CRYPTO 1 73 { .n_name = "cryptofops" }, 74 #define NL_DMIO 2 75 { .n_name = "dmio_fileops", }, 76 #define NL_DRVCTL 3 77 { .n_name = "drvctl_fileops", }, 78 #define NL_DTV_DEMUX 4 79 { .n_name = "dtv_demux_fileops", }, 80 #define NL_FILEMON 5 81 { .n_name = "filemon_fileops", }, 82 #define NL_KQUEUE 6 83 { .n_name = "kqueueops" }, 84 #define NL_MQUEUE 7 85 { .n_name = "mqops" }, 86 #define NL_PIPE 8 87 { .n_name = "pipeops" }, 88 #define NL_PUTTER 9 89 { .n_name = "putter_fileops", }, 90 #define NL_RND 10 91 { .n_name = "rnd_fileops", }, 92 #define NL_SEM 11 93 { .n_name = "semops", }, 94 #define NL_SOCKET 12 95 { .n_name = "socketops" }, 96 #define NL_SVR4_NET 13 97 { .n_name = "svr4_netops" }, 98 #define NL_SVR4_32_NET 14 99 { .n_name = "svr4_32_netops" }, 100 #define NL_TAP 15 101 { .n_name = "tap_fileops", }, 102 #define NL_VNOPS 16 103 { .n_name = "vnops" }, 104 #define NL_XENEVT 17 105 { .n_name = "xenevt_fileops" }, 106 #define NL_AUDIO 18 107 { .n_name = "audio_fileops" }, 108 #define NL_PAD 19 109 { .n_name = "pad_fileops" }, 110 #define NL_MAX 20 111 { .n_name = NULL } 112 }; 113 114 extern int vflg; 115 116 117 static int 118 p_bpf(struct file *f) 119 { 120 struct bpf_d bpf; 121 struct bpf_if bi; 122 struct ifnet ifn; 123 124 strlcpy(ifn.if_xname, "???", sizeof(ifn.if_xname)); 125 126 if (!KVM_READ(f->f_data, &bpf, sizeof(bpf))) { 127 dprintf("can't read bpf at %p for pid %d", f->f_data, Pid); 128 return 0; 129 } 130 if (bpf.bd_bif != NULL) { 131 if (!KVM_READ(bpf.bd_bif, &bi, sizeof(bi))) 132 dprintf("can't read bpf interface at %p for pid %d", 133 bpf.bd_bif, Pid); 134 if (bi.bif_ifp != NULL) 135 if (!KVM_READ(bi.bif_ifp, &ifn, sizeof(ifn))) 136 dprintf("can't read net interfsace" 137 " at %p for pid %d", bi.bif_ifp, Pid); 138 } 139 (void)printf("* bpf@%s rec=%lu, dr=%lu, cap=%lu, pid=%lu", ifn.if_xname, 140 bpf.bd_rcount, bpf.bd_dcount, bpf.bd_ccount, 141 (unsigned long)bpf.bd_pid); 142 if (bpf.bd_promisc) 143 (void)printf(", promisc"); 144 if (bpf.bd_immediate) 145 (void)printf(", immed"); 146 if (bpf.bd_direction == BPF_D_IN) 147 (void)printf(", in"); 148 else if (bpf.bd_direction == BPF_D_INOUT) 149 (void)printf(", inout"); 150 else if (bpf.bd_direction == BPF_D_OUT) 151 (void)printf(", out"); 152 if (bpf.bd_jitcode != NULL) 153 (void)printf(", jit"); 154 if (bpf.bd_async) 155 (void)printf(", asyncgrp=%lu", (unsigned long)bpf.bd_pgid); 156 if (bpf.bd_state == BPF_IDLE) 157 (void)printf(", idle"); 158 else if (bpf.bd_state == BPF_WAITING) 159 (void)printf(", waiting"); 160 else if (bpf.bd_state == BPF_TIMED_OUT) 161 (void)printf(", timeout"); 162 oprint(f, "\n"); 163 return 0; 164 } 165 166 static int 167 p_sem(struct file *f) 168 { 169 ksem_t ks; 170 if (!KVM_READ(f->f_data, &ks, sizeof(ks))) { 171 dprintf("can't read sem at %p for pid %d", f->f_data, Pid); 172 return 0; 173 } 174 (void)printf("* ksem ref=%u, value=%u, waiters=%u, flags=0x%x, " 175 "mode=%o, uid=%u, gid=%u", ks.ks_ref, ks.ks_value, ks.ks_waiters, 176 ks.ks_flags, ks.ks_mode, ks.ks_uid, ks.ks_gid); 177 if (ks.ks_name && ks.ks_namelen) { 178 char buf[64]; 179 if (ks.ks_namelen >= sizeof(buf)) 180 ks.ks_namelen = sizeof(buf) - 1; 181 if (!KVM_READ(ks.ks_name, buf, ks.ks_namelen)) { 182 dprintf("can't read sem name at %p for pid %d", 183 ks.ks_name, Pid); 184 } else { 185 buf[ks.ks_namelen] = '\0'; 186 (void)printf(", name=%s", buf); 187 oprint(f, "\n"); 188 return 0; 189 } 190 } 191 oprint(f, "\n"); 192 return 0; 193 } 194 195 static int 196 p_mqueue(struct file *f) 197 { 198 struct mqueue mq; 199 200 if (!KVM_READ(f->f_data, &mq, sizeof(mq))) { 201 dprintf("can't read mqueue at %p for pid %d", f->f_data, Pid); 202 return 0; 203 } 204 (void)printf("* mqueue \"%s\"", mq.mq_name); 205 oprint(f, "\n"); 206 return 0; 207 } 208 209 static int 210 p_kqueue(struct file *f) 211 { 212 struct kqueue kq; 213 214 if (!KVM_READ(f->f_data, &kq, sizeof(kq))) { 215 dprintf("can't read kqueue at %p for pid %d", f->f_data, Pid); 216 return 0; 217 } 218 (void)printf("* kqueue pending %d", kq.kq_count); 219 oprint(f, "\n"); 220 return 0; 221 } 222 223 int 224 pmisc(struct file *f, const char *name) 225 { 226 size_t i; 227 if (nl[0].n_value == 0) { 228 int n; 229 if ((n = KVM_NLIST(nl)) == -1) 230 errx(1, "Cannot list kernel symbols (%s)", 231 KVM_GETERR()); 232 else if (n != 0 && vflg) { 233 char buf[1024]; 234 buf[0] = '\0'; 235 for (struct nlist *l = nl; l->n_name != NULL; l++) { 236 if (l->n_value != 0) 237 continue; 238 strlcat(buf, ", ", sizeof(buf)); 239 strlcat(buf, l->n_name, sizeof(buf)); 240 } 241 warnx("Could not find %d symbols: %s", n, buf + 2); 242 } 243 } 244 for (i = 0; i < NL_MAX; i++) 245 if ((uintptr_t)f->f_ops == nl[i].n_value) 246 break; 247 switch (i) { 248 case NL_BPF: 249 return p_bpf(f); 250 case NL_MQUEUE: 251 return p_mqueue(f); 252 case NL_KQUEUE: 253 return p_kqueue(f); 254 case NL_RND: 255 printf("* random %p", f->f_data); 256 break; 257 case NL_SEM: 258 return p_sem(f); 259 case NL_TAP: 260 printf("* tap %lu", (unsigned long)(intptr_t)f->f_data); 261 break; 262 case NL_CRYPTO: 263 printf("* crypto %p", f->f_data); 264 break; 265 case NL_AUDIO: 266 printf("* audio %p", f->f_data); 267 break; 268 case NL_PAD: 269 printf("* pad %p", f->f_data); 270 break; 271 case NL_MAX: 272 printf("* %s ops=%p %p", name, f->f_ops, f->f_data); 273 break; 274 default: 275 printf("* %s %p", nl[i].n_name, f->f_data); 276 break; 277 } 278 oprint(f, "\n"); 279 return 0; 280 } 281
Indexes created Wed Sep 24 05:09:52 GMT 2025